Enzymes And Temperature + pH

Question 1

Do enzymes work faster at higher or lower temperatures?

Answer 1

Higher

Question 2

Why do enzymes work faster at higher temperatures?

Answer 2

Because they will have more kinetic energy and therefore there will be more collisions between the enzymes and substrate molecules.

Question 3

When do enzymes work the fastest?

Answer 3

At their optimum temperature.

Question 4

What does heating to temperatures above the optimum do?

Answer 4

Breaks the bonds that hold the enzyme together and the active site will lose its shape. This is known as denaturation.

Question 5

What is the optimum pH for most enzymes?

Answer 5

7 pH

Question 6

What happens if the pH is too high or too low?

Answer 6

The bonds that hold the amino acid chain together to make up the protein can be disrupted/destroyed. This will change the shape of the active site, so the substrate can no longer fit into it, reducing the rate of reactivity.

Question 7

What does moving too far away from the optimum pH do to the enzymes?

Answer 7

It will cause them to denature and activity will stop.